Improvement in loom shedding mechanisms



C. H. LANDENBERGER 8L H. ATKINSON.

Loom-shedding Mechanisms.

No. 145,216. Patented Dec. 2,1873.

-the number of levers.

UNITED STATES PATENT' @Erice CHARLES H. LANDENBERGER AND HENRY ATKINSON,OF PHILADELPHIA, PA., ASSIGNORS TO MARTIN LANDENBERG-ER & CO., 0F SAMEPLACE.

IMPROVEMENT IN Loom SHEDDING MEcHANxsMs.'

Specification forming part of Letters Patent No. 145,216. dafed Dt c1mber 2, 1873; application filed September To all whom it may concern:

Be it known that we, CHAuLEs 1I. LANDEN BERGER and HENRY ATKINSON, bothof the city and county of Philadelphia and State of Pennsylvania, haveinvented an Improvement in Looms, of which the following is aspecication:

The object of our invention is to impart a greater variety of movementsthan usual to a series of heddles operated by thc levers of a Cromptonlor witch loom without increasing the number of said levers.

We attain this object by causing each lever A to impart a risingmovement to some of the heddles controlled by it simultaneously with afalling movement to others, the said opposite movements beingtransmitted from each lever to its heddles through the medium of anendless cord, B, as shown in the elevation, Figure l of the accompanyingdrawing, or through supplemental levers D and E, as illustrated in Fig.4, or through other equivalent devices. The levers A are controlled intheir movements by a pattern chain or cylinder through the medium of aseries of jacks and reciproeatin g frames, the whole constituting thewellknown witch movement, which it has not been deemed necessaryr toillustrate in the drawing.

In an ordinary loom of this class, each lever controls a series ofheddles, the whole of which must be moved simultaneously in 011edirection or the other, so that, in weaving a pattern of a given numberof threads in width, each thread or series ot' threads to be movedsimultaneously must be under the control of a separate lever. Thisnecessarily limits the loom to the production of comparatively plain ornarrowr patterns, twenty to twenty-four levers being asl many as can beconveniently Worked.

With our invention, which we will now proceed to describe in detail, weare enabled to impart opposite movements to two threads or series ofthreads with each lever, thus doubling the capacity of the loom for theproduction of elaborate patterns without increasing The levers arearranged as closely together as possible at one side of the loom, andabove the warps, in the manner shown in Fig. 2, and to the extremitiesof the arms of each lever are connected the opposite ends of a cord, B,which extends transversely across the top of the loom, and is sustainedand guided by pulleys a., al, a?, and a, attached to the loomframe, orto hangers b secured to the rafters above the loom. (See Fig. l.)

It will be observed that when the lever is vibrated thc portion x of thecord will be moved in one direction and the portion in the oppositedirection, and, as the connections d with the heddles j' andv j" aremade through these opposite portions of the cord, it follows that thesaid heddles must also be moved in opposite directions when the lever isvibrated, as indicated by the arrows in Fig. l.

In the present instance, the lever A is represented as operating fourheddles, two of which are raised to the same extent, by the oppositeportions of the cord, simultaneously with a corresponding depression ofthe remaining two; but it will be evident that, by employ-ing the usualcomber-boards and other de- -vices well known to weavers, the number ofheddles to be operated by a single lever may be increased to anyrequired extent; but, whatever may be the number of heddles, a portioncan always be raised simultaneously with the depression of the others.

Our invention is of especial utility in the production ot' figuredshawls and other doublefaced goods. In producing the pattern, Fig. 3,for instance, for which forty-eight independently-controlled threads arerequired, one-half of which appear upon one side of the fabric when theothers are upon the opposite side, twenty-four levers will be suihcient,while with the ordinary arrangement the same number of threads wouldrequire forty-eight levers, which could not be practically operated.

' It is not absolutely necessary, in carrying out our invention, that anendless cord, B, should be employed, as two cords weighted at theirends, or a single weighted cord, might be used in connection with eachlever, as indicated by dotted lines in Fig. l. Another modieution, bywhieh the sume .result 11m-y be zttthrough the medium of the devicesdescribed, tained, is illustrated in Fig. 4. In this ease7 or theirequivalents, for the purpose specified. mmf'ement in opposite directionsis transmit In testimony whereof We have signed our red from eaeh leverA ro two sets of heddles names to this specification in the presence, ofthrough the medium of supplemental levers l) two subscribing Witnesses.

:md E und connecting-cords 71. CHARLES H. LANDENBERGEIL We eluim as ourinvention- HENRY ATKINSON.

A Witch loom in which euch of the levers A \Vit1iesses: is caused tomove two heildles, or two sets of HENRY DORNEMANN,

a heddles, simultaneously in opposite dreetions JOHN F. TAG-UE.

